Apparatus for amusement and instruction in aviation



NOV. 7', 1944. R P, CORTES 125362,19()

lAlfPaRVLUS FOR AMUSEMENT AND INSTRUCTION IN AVIATION Filed Srept. 25, 1941 6 Sheets-Sheet 1 PAFAE L Fll/(f (0,9755 Damned 769550 Vdi de (0,9755: [xfa/fix.

ATTORNEY y YNOV- 7, 1944 R. P. CORTI-:s 2,362,190

APPARATUS FOR AMUSEMENT AND INSTRUCTION IN AVIATION I vFiled Sept. 25, 1941 6? Sheets-Shee 2 9 i y mvEN'roR l5- PAmfL Po/vff (0272's, mwfaf i TfPL-. We Je( [idw/(ffl.

ATTCRNEY J NOV. 7, 1944. R, P CORTES 2,362,190

APPRATUS FOR AMUSEMENT AND INSTRUCTION IN AVIATION Filed Sept. 25, 1941 6 Sheets-Sheet 3 l. .7 -7 -77- 8 ATTORNEY Nov. 7, 1944.` R, P. @wasv 2,362,190

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NOV- 7, 1944 R. P. CORTES 2,362,190

APPARATUS FOR AMUSEMENT AND INSTRUCTION IN AVIATION Filed Sept. 25, 1941 6 Sheets-Sheet 5 123. J, YV|

WM ATTORNEY Nov. 7, 1944.

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l l ATTORNEY Patented Nov. 7, 1944 APPARATUS FOR AMUSEMENT AND INSTRUCTION IN AVIATION Rafael Ponce Corts, deceased, late of Mexico City, Mexico, by Teresa A. Corts; executrix,

Mexico City, Mexico Application September 25, 1941, SerialNo. 412,277

6 Claims.

`This invention relates to new and useful improvements in Letters Patent No. 2,094,397, for an apparatus for amusement and instruction in aviation.

More specifically, the 4invention proposes a A group of improved features for said apparatus.

One feature resides inthe provision of a mechanism operable to balance each plane when passengers of different weights are in the plane and when some of the passengers are absent.

Another .feature resides in the provision of a mechanism by which each suspended plane may make a` complete turn on its `longitudinal axis `and may make partial turns on this axis without interrupting the passage of electric current to the motors of the planes, as will become clear as this specification proceeds.

Another feature resides ina mechanism for operating counterweights to counterbalance automatially the ttal Weight of the passengers in each plane.

. Still another feature resides in the provision of mechanism for limiting the ascending course and the descending course of the airplanes automatically controlled by the action of a certain platform.

, Another feature resides in a mechanism which includes safety belts and which controls certain turns of the airplanes.

For further comprehension of the invention, and of the objects and advantages thereof, reference will be had to the following description and accompanying drawings, and to the appended claims in which the various novel features of the invention are `more particularly set forth.

In the accompanying drawings forming a material part of this disclosure:

Fig. 1 is a fragmentary side elevational view of an apparatus for amusement and instruction in aviation constructed in accordance with this invention. y

Fig; 2gis a fragmentary vertical sectional view taken on the line 2-2 of Fig. 1.

Fig. 3 is a'fragmentary enlarged plan View ofl a portion of Fig. 1 looking in the direction of the line 3`3 thereof.

Fig. 4 is a fragmentary enlarged detailed View of a portion of Fig. 3 showing particularly one Fig. 7 is a fragmentary enlarged detailed view of a. portion of Fig. 6.A

Fig. 8 is a fragmentary enlarged sectional detailed view of a portion of Fig. 7.

Fig. 9 isa fragmentary transverse sectional view taken on the line' 9-9 of Fig. 7. Fig. 10 is a fragmentary transverse sectional View taken on `the line IIJ- I0 of Fig. 7.

Fig. 11 is a fragmentary enlarged sectionalview taken on the line II-Il of Fig. 6. l Fig. 12 is a fragmentary enlargedy detailed View of a portion of Fig. 6. V

Fig. 13 is a fragmentary enlarged detailed View of another portion of Fig. 6. l

Fig. 14 is a fragmentary enlarged sectional view taken on the line l4-kl4 of Fig. 10.

Fig. 15 is a fragmentary vertical sectional view taken on the line |5-I5 of Fig. 14.

, Fig. 16 is a fragmentary enlarged detailed view of a portion of Fig. 1.

' Fig. 17 is a fragmentary enlarged detailed view of a portion of Fig. 16 but showing certain parts broken away to disclose interior parts.

Fig. 18 is a fragmentary enlarged detailed View of a portion cf Fig. 16. y A

Fig. 19 is an elevational view of Fig.'18 looking from the left side. n y Y The apparatus for amusement and instruction in aviation, in accordance with this invention, includes a revolving structure 20 having a central post 2| and a support 22 radially spaced from the central post 214. 'I'he support 22 is mounted along the periphery of a disc shaped platform 23. This platform is supported by a plurality of wheels 24 working on a circular track 25. A horizontal brace 26 is connected between an upper portion of the post 2l and the support 22. Further details of the revolving structure will not' be given in this specification as it forms no part of the in' vention. However, it should be clearly understood that the revolving structure 20 is capable of controlled turning by some prime mover, not illustrated on the drawings.

A radially extending arm 26 is pivotally mount` ed intermediate of its ends by a pintle 21 mounted on the support 22. The arm 26 is stiffened by a vertical brace 28 projecting from the intermediate area having the pintle 21, and a pluralityof-brace portion 26a at its extremity upon Whichthe saddle 30 is turnably mounted. The saddle 3U includes a pair of spaced straps 3| which are turnably mounted on bushings 32 mounted upon the tubular portion 26a. A pair of brackets 33 are mounted on the tubular portion 26ar adjacent the inner edges of the straps 3| and prevent the straps from coming off the bushings 32. These brackets 33 extend over an angular distance of approximately 90, across the top of the tubular portion 26a. The straps 3| are connected with 'wall portions 34 (see Figs. 14 and 15) which are adapted to abut the ends of the brackets 33 when the saddle 38 is turned upon the tubular portion 26a. More specifically, the arrangement is such that the saddle 30 may be turned 90 in one direction and 90 in the other direction. This may be easily understood by an examination of Figs. 14 and 15. The saddle 36 supports a pair 0f depending brackets 35 Whi-ch in turn support a pair of spaced ball bearings 36. These ball bearings are arranged so that their axes are in alignment with each other, and at right angles to the axis of the tubular portion 26a.

An airplane body 31 for passengers is provided with the usual controls for aerial acrobacy such as banking, barrel turning, etc., and is provided with a xedly mounted tube 36 extending along its longitudinal axis in the vicinity of its center. The airplane body 31 is also provided with an electric motor driven propeller 39 at its front. The ball bearings '36 comprise means for rotatively supporting the tube 38 at right angles to the outer end of the arm 26fand through the saddle 36. More specifically, the tube 38 extends coaxially through and is rotatively supported by the bearings 36. The tube 38 is fixedly mounted within the airplane body 31 by being mounted on transverse frame sections 46, 4| and 42 of the airplane body 31. i

The airplane 31 has the usual wings 42 with the usual ailerons 43,'a tail 44, a rudder 45, etc. The airplane body isralso provided with the usual control mechanism for operating the ailerons, tail, rudder, etc., of the airplane body in a conventional manner, not disclosed in detail upon the drawings since suchv constructions are old and form no part of this invention. However, it should be realized that when the amusement and instruction apparatus is in use the various controls may be operated to cause the airplane body to go through various acrobatic maneuvers such as banking, barrel turns, etc., as will become clear as this specification proceeds.

It should be noted that the airplane body 31 is capable of turning coaxially of the tube 38, since the tube 38 is rotatively supported by the bearings 36 of the saddle 35. Moreover, it should be noted that the airplane body 31 may turn upon an' axis coinciding with the axis of the tubular portion 26a, through a limited distance as controlled by the Walls 34 engaging the ends of the brackets 33. Normally, before the time that the apparatus is set into operation, the airplane body rests upony a platform 46 which may be lowered and which may be referred to as a descending platform. This platform normally supports the airplane body 31 when it is in its raised position. The platform 46 is mounted on the upper ends of agroup of support bars 41 which are turnably mounted in a base 48. A plurality of stops 49 are mounted on the base 48 to the front sides of the bars 41 to prevent them from pivoting further forwards than their vertical positions. However, the bars 41 may pivot rearwards so that the platform 46 may 75 move rearwards in the direction of the arrow, in dicated by reference number 50 in Fig. 6.

- The platform 46 is normally locked in its raised forward position by a latch device which includes a bar 5| pivotally supported at its bottom end by a pintle 52. This bar extends upwards and forwards. A manually operable latch 53 is mounted on the platform 46 and engages the front of the bar 5| to hold the platform 46 from moving rearwards under the force of gravity. The bar 5| is urged into a normal upwardly extended position by an expansion spring 54. A handle 55 is connected with the bar 5| and extends upwards to the vicinity of one of the passengers or plane attendant so that the passenger or plane attendant may move the handle 55 to depress the bar 5| so that it disengages the latch 53. Then the platform 46 will fall rearwards in the direction indicated by the arrow 5U. Thus the platform 46 descends. The platform 46 is caused to move rearwardly and downwardly after the passengers are seated in the airplane body 31 and before the airplane body moves upwards for balancing the airplane body in position on the end of the arm 26 as will be hereinafter described.

Means is provided for balancing the airplane body 31 about the outer end portion of the arm 26. This means includes apair of parallel rods 56 and 51 xedly mounted within the airplane body 31 and extending longitudinally thereof. A weight 58 is slidably mounted on the rods 56 and 51. A cable 59 is attached to the Weight 58 and extends rearwards and'engages over a pulley 68. This cable is attached to a chain 6| which extends forwards and engages over a sprocket wheel 62 xedly mounted on a shaft .63. The chain 6| after extending over the sprocket 62 is attached to a pin 64 mounted on the weight 58. The shaft 63 is rotatively supported in a bearing 65. An annular member 66 is ixedly mounted by several brackets 61 upon a stationary portion of the airplane body 31.

The annular member 66 is coaxially located upon the shaft 63. The annular member 66 is provided with a plurality of apertures 68 extending around its perimeter'. A lock pin 69 is mounted upon an arm 10 xed on the shaft 63. The lock pin 66 is urged into engagement with one of the apertures 68 by van expansion spring 1|. The outer end of the lock pin 69 is provided with a knob 12 by which it may be gripped and pulled outwards. The outer end of the shaft 63 is provided with a square portion 13 to receive a socket wrench or other turning tool.

When the descending platform 46 is lowered the airplane body 31 will pivot about thearm 26, depending upon its balance. For example, if the rear passengers, as illustrated in Fig. 6, are lighter than the front passengers the rear portion of the airplane body will pivot upwards. An operator of the device balances the airplane body .by engaging a turning tool on the socket 13 and turning the shaft 63 so as to move the chain 6| to move the weight 58 rearwards. When the airplane body is suitably balanced the pin 69 is reengaged with one of the apertures 68 to lock the weight 58 in its new position.

Means is also provided for automatically balancing the airplane body 31 and its load of passengers about the pivot l21 of the arm 26. This automatic means may best beunderstood from an examination of Figs. 1, 2, 16 and 1'1. It is characterized by a pair of parallel rods.15.extending longitudinally along `inside of the arm 26 and slidably supporting a weight 16 which is adapted to move forwards and Vrearwards on the rods 15 to accomplish the balancing. This weight 16 is moved by an endless chain 11. The chainy 11 has a side portion 11a extending longitudinally through the arm 26 and engaging over a wheel 18 mountedl coaxially on a shaft 19 which is provided with a gear 88 meshing with a worm gear 8| mounted on the'shaft of a controlling motor 82,

The chain` 11 also extends over a wheel, 83 rotatively mounted upon -the front portion of the arm 26. The chain 11 has a side portion 11b which extends externally along the arm 26. An idler r'oller 84 is mounted on the brace 28 for suitably holding thechain 11 tensioned. The ends of the chain 11 are connected to the opposite ends of the weight 16. The arrangement is such that the electric motor 82 may turn in one direction to move the weight 16 rearwards alongthe arm 26, or may turn in the other direction to move the weight 16 forwards along the arm 26.

The motor 82 is controlled by a reversing switch 85; This switch has central live poles 86,.

bridging contacts 81 and 88, and cooperative op.- posed contacts 89 and 90. The bridging contacts 81. and 88 are mounted upon the ends of a pair of rods 9| which are slidably supported in a bracket 92 mounted on the arm 26. The rods 9| are piv. otally connected on the opposite end portions of a bar 83 which is pivotally connected at its center `with a pintle 94 to a rod 98 slidably mounted on a resiliently supported arm |82 which is mounted on a bracket |83 which is xedly mounted on the post 2 The rod |82 slidably engages through the bracket L|83. Aspring |84 is coaxially mounted on the free end of the rod |82 and acts between a bolt |85 and the bracket |83 to resiliently urge the rod |82 inwards so that projecting portions |86 thereof engage thebracket |83.

The arm |88 has a rod |81 pivotally connected near its free end. This rod |81 slidably passes through the bracket |83. Its free end is provided with a collar |88 to prevent complete disengagement of the rod |81 from the bracket |03. An expansion spring |89 is mounted upon the rod |81 and acts between the bracket |83 and the arm |88 to urge the arm outwards. The free end of the arm |88 is provided with a roller ||8 which normally rests against the central portion of the bar 93. The bar 93 has a pair of small projections arranged a short distance on opposite sides of its center over which the roller must pass when the arm 26 pivots upwards or downwards.

An elevator ||4 is vertically slidably mounted on the post 2|. Means is provided for raising and lowering this elevator. This means includes an electric motor l5 ixedly mounted on` the post 2| and having its shaft provided with a worm ||6 driving a worm ||1 which controls adrum ||8 provided with a cable ||9 extending downwards and beneath a wheel |28 supported on the elevator ||4. The cable ||9 then extends upwards and hasits free end attached to the side of the post 2| i The arrangement is such that the elec- I| 4 to move downwards. Similarly,.the electric motor l5 may draw in the cable to raise the platform H4.

An arrangement is provided which causes the arm 26 to follow the lead of the plattform ||4. This arrangement includes a pulley |22 mounted upon the inner end of the arm 28. .A cable |23 passes over the pulley |22. The bottom end of the cable |23 is fixedly mounted o-n the platform 23. The other end of the cable |23 connects with a counterweight |24. Severalguide pulleys |25 are mounted on the counterweight and engage the cable |23 to steady the travel of the counter- Weight. 1

The counterweight |24 has a resiliently mounted bottom bumper |28 which is adapted to rest upon the platform |4 or to resiliently strike the tric 11101501' |5 may be operated to indirectly let platform when the platform I4 is raised.

Means is also provided for limiting upward motion *of the counterweight |24, This means includes a pair of fingers |21 mounted on the counterweight |24 and extending laterally. These fingers |21 are adapted to strikeka bar |28 mounted across a pair of cables |29. The cables |29 are attached at their bottom ends upon a sta' tionary support bracket |38 mounted on the platform 23. At their top ends the cables |29 are attached to an arm |3| which is pivotally supported at its center by a pintle |32 and which is provided with countervveights |33. Thev ngers |21 are resiliently arranged. A pin |34 connects the fingers |21. This pin supports a yoke |35 which is mounted upon a rod |36 slidably.

supported in a bushing |31.A An expansion spring |98 is coaxially arranged on a rod |36 which is supported on a bracket |48 mounted on the counterweight |24. Another spring |4| is also slidably arranged on the rod |36 and is located above the bushing` |31. The springs |38 and |4| Serve to resiliently hold the fingers |21,

The bumper |26 also comprises a pair of iingers |42 which Iare pivotally mounted at the points |43 and which extend downwards. A roller |45 is mounted between the `fingers |42. The ngers 42 are connected by a pin |46 across which a yoke |41 is mounted. A rod |48 is mounted on this yoke and extends upwards through a bracket |49 mounted on the side of the counterweight |24. A spring l58is coaxially arranged on the rod |48 and acts to resiliently urge the iingers |42 downwards.

When the inner end of arm 26 moves downwards the arm |88 moves over the top projection Then the wheel ||8 will pivot the bar 93 so that the contact 88 engages in between the contacts 86 and 98. This closes the circuit through the electricmotor 82 so as to drive the motor in a direction in which the weight 1.6 move outwards on the arm 26. This causes the outer end of the arm 26 to move downwards. When the outer end of arm 26 moves upwards so that the inner end moves downwards and bar 93 rides clear of the roller H8, the spring 99 straightens out the bar 93 so that the switch 85 is open.

When the descending platform 46 is lowered the airplane body 31 may move downwards if the passengers exceed a certain weight. This is automatically corrected, since if the outer end of the arm `26 moves downwards its inner end will move upwards so that the bottom end of the bar 93 will strike the roller ||8 causing the bar '93 to pivot so that the bridging contact 81 will engage in between the contacts and 86. This will cause the motor 82 to rotate moving the weight 16 inwardly on the arm 26 until the arm 26 and its load is balanced. In the balanced position the automatic control will be inthe neutral position shown in Fig. 1'1.

The airplane body 31 is provided with an electric motor |55 for driving the propeller 39. This electric motor |55 receives current from a cable |56. The cable |56 extends into the tube 38 and connects with several contact rings |51 mounted on the outside of the tube 68. These contact rings are separated from each other by insulation material |66. The contact rings |51 are also mounted on an insulation bushing |59 which is mounted on the tube 38. Each contact ring |51 is engaged by a brush |66.

These brushes are mounted on an insulation bar |6| mounted on the saddle 36 of the device. The brushes |6| connect with leads |62 which form a cable |63 which extends through a pipe |66 supported along the interior of the tubular portion 26a of the arm 26. Thus the cable '|63 extends to the live terminals 86 (see Fig 17'). The arrangement is such that electric current may' reach the electric motor |55 without interfering with the aerial acrobacy of the airplane body. Even though the airplane body makes a barrel turn, or banks, or the saddle 36 pivots on the arm 26, the current may always pass from the brushes |60 to the contacts |51 and then to the electric motor. Y

A safety belt is also provided for each of the passengers and these safety belts are associated with means for locking the airplane body 31 from making barrel turns while said safety belts are loose. More specifically, the airplane body 31 is shown provided with a pair of front seats |66 for two front passengers, and a pair of rear seats |61 for two rear passengers. A bolt |68 is mounted on the airplane body between the two front seats |66. This bolt is resiliently urged rearwards by a spring |89 which acts between a collar |16 mounted on the bolt and a stationary portion |1| such as a portion of the airplane body 31. The front end of the bolt |68 is provided with an eye portion |12 through which the safety belt |13 passes. The safety belt |13 has its end portions extending to the sides and is adapted to engage around the mid sections of the two front passengers. The ends of the safety belt |13 are adapted to be connected with hooks |14` f mounted upon the ends o-f chains |15 which are wound around drums |16 located at the sides of the seats |86.

These drums |16 are coaxially mounted with worm Wheels |11 meshing with worms mounted upon a shaft |19 rotatively Supported by several bearings |86. The shaft |19 has one end |19a projecting and formed with a square portion adapted to receive the socket of a turning tool.

Normally, when the safety belt |13 is loose, the bolt |68 is urged rearwards bythe spring |66 so that its rear end engages within a 90 arcuate space |8| formed in an annular section |82 xedly mounted on the saddle 36 (see Figs. 7 and Thus, while the bolt |68 is operative the airplane body 31 may only turn through 90. When the safety belt |13 is properly tightened the bolt |68 is drawn forwards, compressing the spring |66 until its rearend disengages from the 90 arcuate opening |6|. Then the airplane body is free to do barrel turns in so far as the front safety belt is concerned. However, the rear safety belt will still lock the airplane body unless it is also suitably tensioned.

The rear seats |61 are provided with a safety belt |83 which hasv its center passing through the eye |84 of a bolt |85 which is slidably mounted between the seats |61. This bolt |85 is urged rearwards by a spring. |86 coaxially mounted on the bolt and acting between a portion |81 of the airplane body and an end portion of the bolt |85. The rear end ofthe rbolt |85 pivotally connects with a lever |88 which is pivotally mounted intermediate of its ends by a pintle |89. The other end of .the lever |88'connects with a bolt |90 which extends forwards and is slidably supported. The front end |66aof the bolt |96 engages within a segment |6| of a transverse section |92 which is xedly mounted on the saddle 38 (see Figs. 7 and 9).

The ends of the safety belt |83 are adapted to be engaged with hooks |15 of the chains y|14 which engage drums |16 coaxially xedly connected with worm wheels |11 meshing with worms |18 on a shaft |19 rotatively supported by bearings |86 and having a projecting end |19a adapted to be engaged by a turning tool. The arrangement is such that a caretaker of the device may turn the shaft |19 to properly tension the safety belt |83 about the bodies of the rear passengers so that the bolt |85 is drawn forwards, pivoting the lever |88 and withdrawing the bolt |96 so that its front end |969 disengages from the segment |6| of the section |92. The airplane body 31 is then free to make barrel turns.

A brief review of the operation of the device is as follows:

Normally, when the device is not in operation the platform 46 is in a raised position as illustrated in Fig. 6, and the arm 26 is directed downwards so that the airplane body 61 is resting on the platform 66. The airplane body is now ready to receive passengers, as schematically shown in Fig. 6. The safety belts |18 and |33 are now engaged about the passengers so as to indirectly move the bolts |96 and |68 to be free from the sections |82 and |92 of the saddle 36 to release the airplane body 31 so that it may make barrel turns. f

The .platform 46 is then lowered. The airplane bod-y 31 will pivot upon the end of the arm 26, depending upon the relative weights of the front and rear passengers. The counterbalance 58 is then shifted by engaging a turning tool on the square end 13 of the shaft 63 so as to properly balance the airplane body. The counterweight 16 will be automatically moved along the length of the arm 26 to balance the total weight of the airplane body and its passengers in relation to the position of the roller I6.

The electric motor H5 may now be set into operation so as to lower` the platform I I4. The

counterweight |26 will follow the platform H6 and so will the inner end of the arm 26. Thus, v

the outer end of the arm 26 will 'be moved up wards lifting the airplane body 31 to a suitable height. The revolving structure v28 may now be setV turning and the passengers ofv the airplane body 31' may amuse themselves with aerial acrobatics by manipulatingv the controls of the airplane body, that is, by manipulating the ailerons 43, rudder 45, tail i4 etc.

While there has been illustrated and described the preferred embodiments of this invention, it is to be understood that it is not limited to the precise' constructions herein disclosed and the right is reserved to all changes and modifications coming within the scope of the invention as dened in the appended claims.

Having thus described the invention, what is claimed as new, and desired to be secured by United States Letters Patent is:

1. In an apparatus for amusement and instruction in aviation, a revolving structure having a central post and a support radially spaced from said central post, a radially extending arm pivotally mounted intermediate of its ends on said support, a saddle coaxially turnably mounted on the outer end of said arm, an airplane body for passengers and provided with controls for aerial acrobacy such as banking, barrel turning, etc. and having a tube extending along its longitudinal axis in the vicinity of its center and said airplane body having at the front an electric rmotor driven propeller, means for rotatively supporting Said tube at right angles to the outer end of said arm and through said saddle, and means for limiting pivoting of said arm for controlling ascending and descending of its outer end and thus of said airplane body, said saddle being provided With abutments engageable with brackets mounted on said arm for limiting turning of the saddle through a restricted annular distance.

2. In an apparatus for amusement and instruction in aviation, a revolving structure having a central post and a support radially spaced from said central post, a radially extending arm pivotally mounted intermediate of its ends on said support, a saddle coaxially turnably mounted on the outer end of said arm, an airplane body for passengers suspended from said saddle, means for automatically balancin-g,said airplane body and its load about the rpivot of said arm, said means for automatically balancing said airplane body and its load about the pivot ofl said arm including a Weight slidably mounted to move along said arm, and means for moving said 'weight controlled With a reversible motor, and

means for operating said motor in one direction or the other.

3. In an apparatus for amusement and instruction in aviation, a revolving structure having a central post and a support radially spaced from said central post, a radially extending arm pivotally mounted intermediate of its ends on said support, a saddle coaxially turnably mounted on the outer end of said arm, an airplane body for passengers, means for automatically balancing said airplane body and its load about the pivot of said arm, said means for automatically balancing said airplane body and its load about the pivot of said arm including a Weight slidably mounted to move along said arm, and means for moving said weight controlled with a, reversible motor, and means for operating said motor in one direction or the other, depending upon'the position of the inner end of said arm.

4. In an apparatus for amusement and instruction in aviation, a revolving structure having a central post and a support radially spaced from said central post, a radially extending arm pivotally mounted intermediate of its ends on said support, a saddle coaxially turnably mounted on the outer end of said arm, an airplane body for ancing said airplane body and its load about the pivot of said arm including a weight slidably mounted to move along said arm, and means for moving said Weight controlled with a reversible motor, and Ameans for operating said motor in one direction or the other, depending upon the position of the inner end of' said arm, relative to a bracket movably mounted on said central post.

5. In an apparatus for amusement and. instruction in aviation, a revolving structure having a central post and a support radially spaced from said central post, a radially extending arm pivotally mounted intermediate of its ends on said support,"a saddle coaxially turnably mounted on the outer end of said arm, an airplane body for passengers and provided with controls for aerial acrobacy such as banking, barrel turning, etc. and having a tube extending along its longitudinal axis in the vicinity of its center and said airplane having at the front an electric motor driven propeller, means for rotatively supporting `said tube at right angles to the outer end of said arm` and through said saddle, safety belts for said`passengers,means for locking said airplane body from making barrel turns while said safety belts are loose, Said means for locking said airplane body from making barrel turns including slidably'mounted bolts through which said safety belts pass, means for tensioning said safety belts to move said bolts, and means for locking the airplane body to limited turning when said bolts are in normal positions.

6. In an apparatus for amusement and instruction in aviation, a revolving structure having a central post and a support radially spaced from said central post, a radially extending arm pivotally mounted intermediate of its ends on said support, a saddle coaxially turnably mountedI on the outer end of said arm, an airplane body for passengers and provided with controls for aerial acrobacy such as banking, barrel turning, etc. and having a tube extending along its longitudinal axis` in the vicinity of its center and said airplane having at the front an electric motor driven propeller, means for rotatively supporting said tube at right angles to the outer end of said arm and through said saddle, safety belts for said passengers, means for locking said airplane body from making barrel turns While said safety belts are loose, said means for locking said airplane body from making barrel turns including slidably mounted bolts through which said safety belts pass, means for tensioning said safety belts to move said bolts, and means for locking the airplane body to limited turning when said bolts are in normal positions, said means for tensioning said belts being controlled with manually turnable shafts.

rrEREsA A. VDA. DE CORTS, Executrz'zz: of the Estate of Rafael Ponce Corts,

Deceased. 

